diff --git a/frontend/src/pages/Pos.tsx b/frontend/src/pages/Pos.tsx
index 358b39f..c3094e6 100644
--- a/frontend/src/pages/Pos.tsx
+++ b/frontend/src/pages/Pos.tsx
@@ -20,6 +20,9 @@ import { odooApi, type Service, type Patient, type InventoryItem, type PosChecko
 const fmtMoney = (n: number) =>
   (n || 0).toLocaleString('es-MX', { style: 'currency', currency: 'MXN', maximumFractionDigits: 2 });
 
+const fmtUsd = (n: number) =>
+  `$${(n || 0).toLocaleString('es-MX', { minimumFractionDigits: 2, maximumFractionDigits: 2 })} USD`;
+
 const METODO_OPTIONS = [
   { value: 'cash', label: 'Efectivo' },
   { value: 'card', label: 'Tarjeta' },
@@ -62,9 +65,11 @@ const Pos: FC = () => {
   // Cobro
   const [cobroOpen, setCobroOpen] = useState(false);
   const [metodo, setMetodo] = useState('cash');
+  const [moneda, setMoneda] = useState<'MXN' | 'USD'>('MXN');
   const [recibido, setRecibido] = useState('');
   const [conPuntos, setConPuntos] = useState(false);
   const [cobrando, setCobrando] = useState(false);
+  const [tcRate, setTcRate] = useState<number | null>(null);
 
   // Resultado
   const [resultado, setResultado] = useState<PosCheckoutResult | null>(null);
@@ -118,6 +123,18 @@ const Pos: FC = () => {
       .catch(() => {});
   }, []);
 
+  // Tipo de cambio USD/MXN: al montar y refresco cada 5 min
+  useEffect(() => {
+    const fetchTc = () => {
+      odooApi.getExchangeRate()
+        .then((res) => { if (res.current) setTcRate(res.current.rate); })
+        .catch(() => {});
+    };
+    fetchTc();
+    const interval = setInterval(fetchTc, 5 * 60 * 1000);
+    return () => clearInterval(interval);
+  }, []);
+
   // Búsqueda server-side de paciente
   useEffect(() => {
     if (paciente || altaRapida) return;
@@ -183,7 +200,15 @@ const Pos: FC = () => {
   const numItems = lines.reduce((a, l) => a + l.qty, 0);
   const puntosPaciente = paciente?.wallet_points ?? 0;
   const puedePuntos = puntosPaciente >= total && total > 0;
-  const cambio = metodo === 'cash' && recibido ? Math.max(0, (parseFloat(recibido) || 0) - total) : 0;
+  // Equivalentes USD (si hay tipo de cambio configurado)
+  const toUsd = (mxn: number): number | null => (tcRate ? mxn / tcRate : null);
+  const recibidoMxn = recibido
+    ? moneda === 'USD' && tcRate
+      ? (parseFloat(recibido) || 0) * tcRate
+      : parseFloat(recibido) || 0
+    : 0;
+  const cambio = metodo === 'cash' && recibido ? Math.max(0, recibidoMxn - total) : 0;
+  const cambioUsd = moneda === 'USD' && tcRate ? cambio / tcRate : 0;
 
   const crearPacienteRapido = async () => {
     if (!altaForm.name.trim() || !altaForm.phone.trim()) {
@@ -214,6 +239,7 @@ const Pos: FC = () => {
       return;
     }
     setMetodo('cash');
+    setMoneda('MXN');
     setRecibido('');
     setConPuntos(false);
     setCobroOpen(true);
@@ -235,6 +261,7 @@ const Pos: FC = () => {
         payment_method: metodo,
         amount_received: metodo === 'cash' && recibido ? parseFloat(recibido) : undefined,
         pay_with_points: conPuntos,
+        currency: moneda,
       });
       if (res.status === 'success') {
         setResultado(res);
@@ -372,23 +399,41 @@ const Pos: FC = () => {
     <>
       <div className="flex items-center justify-between text-sm">
         <span className="text-theme-muted">Subtotal</span>
-        <span className="text-theme-heading">{fmtMoney(subtotal)}</span>
+        <span className="text-theme-heading">
+          {fmtMoney(subtotal)}
+          <span className="text-xs text-theme-muted ml-1.5" title={toUsd(subtotal) === null ? 'Configura el tipo de cambio en Configuración' : undefined}>
+            {toUsd(subtotal) !== null ? `≈ ${fmtUsd(toUsd(subtotal)!)}` : '—'}
+          </span>
+        </span>
       </div>
       <div className="flex items-center justify-between text-sm gap-2">
         <span className="text-theme-muted">Descuento</span>
-        <input
-          type="number"
-          min={0}
-          step={50}
-          value={discount}
-          onChange={(e) => setDiscount(e.target.value)}
-          placeholder="0"
-          className="w-28 border border-theme-border-strong rounded-lg px-2 py-1 text-sm text-right"
-        />
+        <span className="flex items-center gap-1.5">
+          {discountNum > 0 && toUsd(discountNum) !== null && (
+            <span className="text-xs text-theme-muted">≈ {fmtUsd(toUsd(discountNum)!)}</span>
+          )}
+          <input
+            type="number"
+            min={0}
+            step={50}
+            value={discount}
+            onChange={(e) => setDiscount(e.target.value)}
+            placeholder="0"
+            className="w-28 border border-theme-border-strong rounded-lg px-2 py-1 text-sm text-right"
+          />
+        </span>
       </div>
       <div className="flex items-center justify-between">
         <span className="text-base font-semibold text-theme-heading">Total</span>
-        <span className="text-xl font-heading font-bold text-theme-heading">{fmtMoney(total)}</span>
+        <span className="text-right">
+          <span className="text-xl font-heading font-bold text-theme-heading">{fmtMoney(total)}</span>
+          <span
+            className="block text-xs text-theme-muted"
+            title={toUsd(total) === null ? 'Configura el tipo de cambio en Configuración' : undefined}
+          >
+            {toUsd(total) !== null ? `≈ ${fmtUsd(toUsd(total)!)}` : '—'}
+          </span>
+        </span>
       </div>
       <Button
         className="w-full mt-1 !py-3 text-base"
@@ -591,24 +636,60 @@ const Pos: FC = () => {
           <Select label="Método de pago" options={METODO_OPTIONS} value={metodo} onChange={(e) => setMetodo(e.target.value)} />
           {metodo === 'cash' && !conPuntos && (
             <>
+              <div>
+                <p className="block text-xs font-medium mb-1.5 text-theme-muted">Moneda</p>
+                <div className="inline-flex rounded-full border border-theme-border-strong overflow-hidden">
+                  <button
+                    type="button"
+                    onClick={() => setMoneda('MXN')}
+                    className={`px-4 py-1.5 text-sm font-medium transition ${
+                      moneda === 'MXN' ? 'bg-theme-accent text-theme-inverse' : 'bg-theme-surface text-theme-muted hover:bg-theme-bg'
+                    }`}
+                  >
+                    MXN
+                  </button>
+                  <button
+                    type="button"
+                    onClick={() => tcRate && setMoneda('USD')}
+                    disabled={!tcRate}
+                    title={!tcRate ? 'Configura el tipo de cambio en Configuración' : undefined}
+                    className={`px-4 py-1.5 text-sm font-medium transition ${
+                      moneda === 'USD' ? 'bg-theme-accent text-theme-inverse' : 'bg-theme-surface text-theme-muted hover:bg-theme-bg'
+                    } ${!tcRate ? 'opacity-40 cursor-not-allowed' : ''}`}
+                  >
+                    USD
+                  </button>
+                </div>
+                {moneda === 'USD' && tcRate && (
+                  <p className="text-xs text-theme-muted mt-1.5">Tipo de cambio: {tcRate.toFixed(2)} MXN por 1 USD</p>
+                )}
+              </div>
               <Input
-                label="Recibido"
+                label={moneda === 'USD' ? 'Recibido (USD)' : 'Recibido'}
                 type="number"
                 min={0}
                 step={10}
                 value={recibido}
                 onChange={(e) => setRecibido(e.target.value)}
-                placeholder={String(total)}
+                placeholder={moneda === 'USD' && tcRate ? (total / tcRate).toFixed(2) : String(total)}
               />
+              {moneda === 'USD' && recibido && tcRate && (
+                <p className="text-sm text-theme-muted">≈ {fmtMoney(recibidoMxn)} MXN</p>
+              )}
               {recibido && (
                 <p className="text-sm">
                   <span className="text-theme-muted">Cambio: </span>
-                  <span className={`font-semibold ${cambio > 0 ? 'text-theme-heading' : 'text-theme-muted'}`}>{fmtMoney(cambio)}</span>
+                  <span className={`font-semibold ${cambio > 0 ? 'text-theme-heading' : 'text-theme-muted'}`}>
+                    {fmtMoney(cambio)}
+                    {moneda === 'USD' && cambio > 0 && (
+                      <span className="text-theme-muted font-normal"> (≈ {fmtUsd(cambioUsd)})</span>
+                    )}
+                  </span>
                 </p>
               )}
             </>
           )}
-          {puedePuntos && (
+          {puedePuntos && moneda === 'MXN' && (
             <label className="flex items-center gap-3 p-3 border border-theme-border-strong rounded-xl cursor-pointer hover:bg-theme-bg">
               <input
                 type="checkbox"
@@ -676,8 +757,19 @@ const Pos: FC = () => {
               )}
               <div className="flex justify-between font-bold text-theme-heading"><span>Total</span><span>{fmtMoney(resultado.sale.total)}</span></div>
               <div className="flex justify-between"><span className="text-theme-muted">Método</span><span>{resultado.payment ? metodoLabel(resultado.payment.payment_method) : 'Puntos'}</span></div>
+              {resultado.recibido_usd && resultado.recibido_usd > 0 && resultado.rate_used && (
+                <div className="flex justify-between"><span className="text-theme-muted">Recibido USD</span><span>{fmtUsd(resultado.recibido_usd)} (TC {resultado.rate_used.toFixed(2)})</span></div>
+              )}
               {resultado.cambio > 0 && (
-                <div className="flex justify-between"><span className="text-theme-muted">Cambio</span><span>{fmtMoney(resultado.cambio)}</span></div>
+                <div className="flex justify-between">
+                  <span className="text-theme-muted">Cambio</span>
+                  <span>
+                    {fmtMoney(resultado.cambio)}
+                    {resultado.cambio_usd && resultado.cambio_usd > 0 && (
+                      <span className="text-theme-muted"> · {fmtUsd(resultado.cambio_usd)}</span>
+                    )}
+                  </span>
+                </div>
               )}
               {resultado.puntos_ganados > 0 && (
                 <div className="flex justify-between"><span className="text-theme-muted">Puntos ganados</span><span>+{resultado.puntos_ganados} pts</span></div>
diff --git a/frontend/src/services/odoo.ts b/frontend/src/services/odoo.ts
index a58a417..98e1f14 100644
--- a/frontend/src/services/odoo.ts
+++ b/frontend/src/services/odoo.ts
@@ -690,6 +690,7 @@ export interface PosCheckoutPayload {
   payment_method?: string;
   amount_received?: number;
   pay_with_points?: boolean;
+  currency?: 'MXN' | 'USD';
 }
 
 export interface PosCheckoutResult {
@@ -697,6 +698,9 @@ export interface PosCheckoutResult {
   sale: Sale;
   payment: Payment | null;
   cambio: number;
+  cambio_usd?: number;
+  rate_used?: number | null;
+  recibido_usd?: number;
   puntos_usados: number;
   puntos_ganados: number;
   wallet_points: number;
diff --git a/odoo-addons/skeen_whatsapp/controllers/frontend.py b/odoo-addons/skeen_whatsapp/controllers/frontend.py
index 1b30c44..6399535 100644
--- a/odoo-addons/skeen_whatsapp/controllers/frontend.py
+++ b/odoo-addons/skeen_whatsapp/controllers/frontend.py
@@ -2016,6 +2016,17 @@ class SkeenFrontendController(http.Controller):
                     }))
             total_est = max(0.0, subtotal - discount)
 
+            # Moneda y tipo de cambio: validar ANTES de crear nada
+            currency = data.get('currency', 'MXN')
+            rate_used = None
+            if currency == 'USD':
+                tc = request.env['skeen.tipo.cambio'].sudo().search([], order='date desc, id desc', limit=1)
+                if not tc:
+                    return json_response({'status': 'error', 'message': 'Configura el tipo de cambio USD en Configuración'}, 400)
+                rate_used = tc.rate
+            elif currency != 'MXN':
+                return json_response({'status': 'error', 'message': 'Moneda no soportada (MXN/USD)'}, 400)
+
             # Validar saldo de puntos ANTES de crear nada
             pay_with_points = bool(data.get('pay_with_points'))
             Monedero = request.env['skeen.monedero'].sudo()
@@ -2061,16 +2072,27 @@ class SkeenFrontendController(http.Controller):
             restante = round(venta.amount_due, 2)
             pago = None
             cambio = 0.0
+            cambio_usd = 0.0
+            recibido_usd = 0.0
             if restante > 0:
                 received = float(data.get('amount_received', restante) or restante)
+                reference = ''
+                if currency == 'USD':
+                    # Recibido en dólares: convertir a MXN con el TC vigente (ya validado arriba)
+                    recibido_usd = received
+                    received = round(recibido_usd * rate_used, 2)
+                    reference = f'USD {recibido_usd:.2f} @ TC {rate_used:.2f}'
                 pay_amount = restante if received >= restante - 0.001 else received
                 cambio = max(0.0, round(received - restante, 2)) if received > restante else 0.0
+                if rate_used:
+                    cambio_usd = round(cambio / rate_used, 2)
                 pago = request.env['skeen.pago'].sudo().create({
                     'partner_id': partner.id,
                     'amount': pay_amount,
                     'payment_method': method,
                     'state': 'completed',
                     'payment_date': fields.Datetime.now(),
+                    'provider_reference': reference,
                 })
                 venta.write({'amount_paid': venta.amount_paid + pay_amount})
                 if venta.amount_paid >= venta.total:
@@ -2086,6 +2108,9 @@ class SkeenFrontendController(http.Controller):
                 'sale': self._sale_to_dict(venta),
                 'payment': self._payment_to_dict(pago) if pago else None,
                 'cambio': cambio,
+                'cambio_usd': cambio_usd,
+                'rate_used': rate_used,
+                'recibido_usd': recibido_usd,
                 'puntos_usados': puntos_usados,
                 'puntos_ganados': int(venta.total / 10) if venta.state == 'paid' else 0,
                 'wallet_points': partner.wallet_points,